We service amplifiers & pre-amplifiers by: Airtight Atma-Sphere Audible Illusions Audio Note Audio Research Co. (ARC) Cary Audio Design Carver Reference Cello Classé Conrad-Johnson (CJ) Convergent Audio Technology (CAT) Counterpoint David Berning Forté Futterman Goldmund Jadis J.C. Verdier Jeff Rowland Design Group Krell KSS Linn Madrigal Manley Marantz Mark Levinson McCormack McIntosh Melos Meridian New York Audio Labs (NYAL) Pass Labs PS Audio Quicksilver Rowland Research Spectral Threshold Valve Amplification Co. (VAC) Vacuum Tube Logic (VTL) and more... (please inquire) Bold indicates factory authorized repair service.